Dumping truck



Nov@ 10r 1925. C. A. SNYDER DUMPI NG TRUCK Filed July 11', 1925- 3 sheets-sheet 1 i* A BQ f gi IL 1 1% Q. N T4 L, N 7 l R\, G 1 A gwuenfoz @Hoz um? Nov. 10 1925- l 1,561,286-

c. A. SNYDER DUMPING TRUCK Filed July 11, 1925 5 sheetsneet 2 Nov. 1oI 1925. l 1,561,286

C. A. SNYDER DUMP. I NG TRUCK Filed July V11,1925 5 SheetsSheet 5 Ill l ZI

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Patented Nov. 10, 1925.

UNITED 'STATES PATENT- osi-ica cEcIL A. sNYnnn., or nAMrs'rEAn, MARYLAND, AssIGNon or ONE-HALF '.ro LEWIS c.

. cAnraIDnn, or n nlsrnns'rown, MARYLAND.

' 4`nii'zuinige Timex.

. l i Appnmmnjaled my 11f'19a5. sei-m1 m, 42,863. f

' To all 'wlomc't may concern.' l

' Be it known that I, Cron. A. SNrDnR, a citizenliofx. the United States, residmg 'at Hampstead,",in the county of Carroll and l State of Maryland, have invented certain new and useful-,Im rovements in Dumping Trucks, of which t ica'tion. y Thisl invention relates to vlumber .trucks and has special reference to a dump vtruck for lumber. -v l"Trucks of this character have been devised wherein .the dump body. is shiftably supported on the frame and moved back- 16 wardly by suitable means until the centerof gravity of the loadv asses beyond the rear end of the'frame w ereupon the bodv tilts and the load isI discharged. Suc trucks are objectionable because of .lack of a0 control of thefdumping so 'that'v the rear end of the bod fre uently strikes thefgrund with such orco t at breakagesensue. Other trucks have been designed with lifting levers attached to--the dump body.

Iclose to the-vertical line from the -center of gravity of theloadfdownwardly, the center i of gravity being. tilted rearwardlyof the rear. end of the frame upon the load being l drawn rearwardly and stopped by a suitp able check withthe center of gravity for- 'ward of such check. Such trucks are ob- )ectio'nable because ofthe aforesaid diiiculty of control and are further objection-- able because vof the 4'excessive forceneeded, a5 .under such conditions, to 4raise the front end ofthe load.

With these objections in mind one object of the present invention .is to provide an 4.0 this descriptionwherein no sudden destruction -`drop ofthe rea'r end of the body will take place under load conditions. 4

A second important object of the inven.

tion is to rovide an improved truck construction w erein the front end of the body will be initially raised to. a somewhat inclined position by means requiring `but little force, the body being drawn backward in this position so that its rear-end is close tothe ground andthe final tiltin foi' effecting dumping bein accomplishe with but little power expen iture. With the' above and other objects in view l as will be hereinafter ap' arent, the invention consists in general o certain novel dee following is 4a speer- V tails` of construction and combinations 'of parts heremafter fully described, illustrated 1n the accompanying drawings and specifically claimed.

In the vaccompanying drawings like vchar- I acters of reference indlcate like parts in the several vlews, and:

Figure'lis a section ofthe rear-part of- :an automobile-truck yas 'constructed in accordance wlth the present invention.

l5 is a similarvi'ew showing the imtlal" tilting ofthe body 'in full lines and lts dumping. position indotted lines.

AF1 kre 3'is a planview thereof on a reduce scale'.V u

`Figure 4-is` an enlarged section on the line 4,-4ofFigureL e p In the present embodiment ofther inven-V tion there is shown a truck chassis having longitudinal side frame member 10 vof chan-1 75 neliform. On to of these members rests simlarauxiliary rame members 11 and to the outer sides ofthese members 11`l are secured Z-bars 12 -which arefarranged Vto form channels open at theltop and closed at their rear ends by stops 13. On top. of the channels 11 rest the 1011' 'tudinal frame members 14 of the truck boA yB;

. Journalled in the'rear ends of the ymembers 11 is a drumor roller 15 whereon the 35 rear ends of the members 14 rest and one end of this `drum has its journal provided with a gear -16 wherewith' meshes a.- pinion 17 ixed on a shaft 18 which extends trans-v versely of the chassis and is journalled in said members 11. Bearings 19 are carried drum in such positionv that 1t maysup rtv improved general constructlon oftruck of fpgheA the members 14. The remaining end o shaft 18 has secured thereon a ar 2O where- -95 with meshes a pinion 21 carrie on a shaft22 extending .across the rear 'portion of the chassis. A crank 23 is adapted'to fit either the shaft 18 or'the shaft 22, being used on the shaft 18 'for 1i ht loads or an unloaded 100 bodyand on the s aft 22 for heavy loads. Y Also thisfcrank can be shifted to lbrin its handle under the body of the truck to dock the drum against rotation. Y

The members 14 are connected at their 105 rea-r ends by a cross frame member or bar 'wheels 28which travel in the channels 11V on this drum and extend forwardly to an axle or shaft 27 to which they are attached. This shaftl 27 is provided with rollers or.

and extending rearwardly and upwardly from this shaft are .arms 29 which are connected by braces 30 and have their forward ends connected to a cross bar 31 carried by the members 14. Thus, when the drum is revolved in proper direction the chains 26 are pulled and the body B, drawn to the rear. In order to lighten the draft by raising the front end of the body the channels 11 are each provided on its lower flange with a track 32 consisting of a thin flat strip which terminates just to thev rear of the normal position of the rollers ,and struts 33 normally engage discs 34 on said shaft to raise the body, these struts being connected at their upper ends to said body.

Adjacent the forward ends of the members 14 there is provided a transverse shaft or bar 35 whereon are pivoted bars 36l which travel in the channels formed by the Z-barsl Springs 37 serve to prevent these bars or levers 36 from `exceeding certain limits of movement and stops 38 are fixed to themembers 14 to limit rearward movement. of the body.

' In operation let it be supposed that the bodyis in the position shown in Figure l.

Then if the drum be revolved to draw the 'body to the rear the wheels or rollers 28 will run up on the tracks and lift .the front ends of the members 14 clear of themembers 1l. Next the forward ends of the levers 36will engage the stops 13 and incline the body as shown in full lines in Figure v2. This of course will effect inclination of the bars or levers 29 as also shown in said figure 'so that it now becomes an easy matter, owing to this inclination to further tilt the body to the position shown in dotted lines in Figure 2. Meanwhile the chain 25 'has unwound. Upon reaching the dotted line position the load will dump whereupon reversal of movement of the drum will restore the body to normal position.

Having thus described the invention, what is claimed as new7 is:

l. In a dump truck, a chassis, a body sup- -ported on said chassis and movable longitudinally thereof, means to move said body rearwardly of the chassis, a pair of arms actuated by said rearward movement for eiTecting partial checking of said rearward movement and assisting primary tilting yof the body and a second pair of arms controlled by the action of the body moving means to effect further tilting of said body.

2. In a dump truck, a chassis, a body supported on said chassis and movable longitudilnally thereof, means to move said body rearwardly of the chassis, a pair of arms actuated by said rearward movement for leffecting partial checking of said rearward movebody and extending downwardly and rearwardly from their pivotal axis, guides carried by the chassis wherein the free ends of said arms move, stops vin said guides engaging said free ends upon rearward movement of saidbody to effect tilting of said body to an extent determined by the length of said arms, said moving means including elements arranged to eifect further tilting of the body 'upon the'body reaching the limit of its rear movement, and stop means for limiting said rearward movement- 4. In a dump truck, a chassis, a body sup- 'pbrted on said chassis and movable longi tudinally thereof, means to move said body rearwardly on said chassis, a pair of arms pivotally supported on opposite sides of said body and extending downwardly and rearwardly from their pivotal axis, guides car* ried bythe chassis wherein the free ends of said arms move, and stops in said guides engaging said free ends upon rearward movement of said body to effect tilting of said body to an extent determined by the length of said arms, said moving means including a pair of arms pivotally mounted on said body and extending forwardly and downwardly from their pivotal axis, a drum on the rear of the chassis on which the rear of the body rolls, a cable wound on said drum and connected .toy the -last mentioned arms and guides on said chassis by which the free ends of the last mentioned arms are guided; and stop means for limiting the rearward movement of the body.

5. In a dump truck, a chassis, a body supported on said chassis and movablelongitudinallythereof, means to move said body rearwardly on said chassis, a pair of arms pivotally supported on opposite sides of said body and extending downwardly and rearwardly from their pivotal axis, guides carried by the chassis wherein the free ends of said arms move, and -stops in said guides .engaging said free ends upon rearward movementof said body to effect tilting of said body to an extent determined by the length of said arms, said moving means including-a pair of arms pivotally mounted on said body and extending forwardly and downwardly from their pivotal axis, a drum on the rear of the chassis'on which the rear of the body rolls, a shaft connecting the free ends of said second mentioned arms, rollers on said shaft at the ends thereof, guides on the chassis receiving said rollers, a drum at the rear of said chassis on `which the rear under part of the body rests, and a cable 'wound on said drum and connected to said shaft; and stop means for limiting rearward movement ofthe body.

A 6. .In a dump truck, a chassis, a body supported on said chassis and movable longitudinally thereof, means to move said body rearwardly on said chassis, a pair of arms pivotally supported on opposite -sides of said body and extending'downwardly and rearwardly from their pivotal axis, guides i Vcarried by the chassiswherein the free ends of said arms nieve, and stops in said guides engaging said free ends upon rearward .movement of said body to effect tilting 'of said body to an extent determined by the length of said arms, said moving means in-v cluding a pair of arms piv tally mounted on said body a11`d extendingforwardly and downwardly from their pivotal axis, a drum 'on the rear of the chassis on which the rear slightly lifting the forward part of the body tov free it from Contact with the chassis, a-

drum at the rear of said chassis on which the rear under part of the body rests, and a cable wound on said drum'and connected to said shaft; and stop means for limiting rearward movement of the body.

In testimony whereof I affix my signature.

CECIDA. SNYDER. 

